2 Suggested Answers

Hi,
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Is the engine actually over heating or just the gauge giving incorrect readings?? The stepper motor in the console's temp gauge could be defective. Have someone with a laser heat gun check the temp of the engine around the thermostat to find the correct temp.

Had F06 error usually when the washer went into spin cycle. Followed all tips on different sights. No real concrete solutions to my problem. Sense my problem was intermittent I ruled out the motor. I started looking at my MCU and found my heat sink was really hot to the touch. I slipped MCU out of wash machine still electrically connected and put my window fan on MCU while operating and washer worked perfectly. I the went down to Radio Shack and picked up a 115v CPU fan ($20) and installed on my heat sink. Just splice fan wires to MCU power wires (wire connector w/ the 2 largest pink wires). Mount fan creatively to heat sink (tywraps, hot glue gun, however) . I saved $150 and the heartache down the road. I think this a common problem for that MCU. Hope this helped.
<br />
Robert,
Aircraft Technician

I have 4 dead MW heat guns with the same problem. The most common problem is a blown fuse in the heating element assembly which prevents the circuit from being completed. It is attached inline with the Red wire. Test the fuse with an Ohm meter, then use a jumper cable to temporarily jump the fuse. The fan and heater should then work. Replace the fuse and you will have a working heat gun

With out the thing plugged in with an OHM meter the heting element can be checked with the nose removed. Most of the time once the nose is removed the problem is easy to see the end is burnt off the element connection. Remake the connection reinstall the nose and test. The heating element runns right off the switch and the connection there is easy to see with the handle opened. This is simple unit and wires burnt off from being too hot is almost always the problem. look it over carfully and the problem will be seen.

Heat gun tips often get bad electrical connection where the nuts tighten to the tip ends. Remove the tip, clean the ends, re-install the tip, making sure the nuts TIGHTEN onto the tip ends. Your problem is common and always caused by a poor connection at the tip ends/nuts.

i have fixed one like this and in my case it turned out to be the shaft from the motor to the fan was broken , so i just reglued the fan back onto the shaft with a really good heat resistant glue and it works fine .

Heat guns look a lot like hair dryers - but, as many instructions thoughtfully point out, should never be used for drying hair! The method of operation of a hot air gun is similar to a hair dryer: a fan pulls air into the body of the tool and drives it across an electric heating element and out through a nozzle.
For stripping paint, the heated air is directed onto the painted surface, causing it to soften so that it can be easily stripped off - either by using a stripping knife or hook. For best results it is best to work up the surface with the heat gun above the stripping tool, softening the paint just before the stripping tool reaches it. The tool is used one-handed, with the other hand to hold the stripping tool.
Some heat guns can be used sitting on a bench so that two hands are free to use the hot air for other applications.

Simple Question: Did you check to see if the fan switch on the
t-stat is in ON or AUTO? If ON the fan runs nonstop. If in auto the fan cycles with the outdoor unit.
next does the fan shut off if you turn the t-stat to off?
A stuck relay should keep the fan running all the time.
Sometimes if the relay is stuck you can whack the side of the Air Handler and the connection will break.
Sometimes instead of a relay there is a stack switch.
It's a little black stack of 3 disks this is a bi-metal switch.
they do get stuck more often than relays.
The fan relay may be on a electronic board. I don't know for sure without seeing your unit.
Good Luck Phil